.hidden {
  display: none !important;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", system-ui, sans-serif;
  background: linear-gradient(135deg, #f4f7f7, #eef4ff);
  color: #18202a;
}

.shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 32px;
}

.eyebrow {
  margin: 0 0 12px;
  color: #5271ff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
}

.hero h1 {
  margin: 0;
  font-size: 48px;
  line-height: 1.1;
}

.subtitle {
  margin: 16px 0 0;
  color: #5d6978;
  max-width: 640px;
  font-size: 18px;
}

.user-panel {
  min-width: 240px;
  padding: 20px;
  border: 1px solid rgba(82, 113, 255, 0.14);
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: blur(16px);
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(31, 41, 55, 0.08);
}

.user-status {
  font-size: 14px;
  color: #334155;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.card,
.login-card {
  background: #fff;
  border-radius: 28px;
  padding: 28px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(148, 163, 184, 0.15);
}

.card-tag {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(82, 113, 255, 0.12);
  color: #3554d1;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 16px;
}

.card h2,
.login-card h2 {
  margin: 0 0 12px;
  font-size: 28px;
}

.card p,
.login-card p {
  margin: 0;
  color: #526072;
  line-height: 1.7;
}

.auth-switcher {
  display: inline-flex;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: #f1f5f9;
  margin-top: 20px;
}

.switch-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: #475569;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.switch-btn.active {
  background: #111827;
  color: #fff;
}

.card-actions,
.login-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.primary-btn,
.ghost-btn,
.link-btn {
  appearance: none;
  border: none;
  border-radius: 14px;
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.primary-btn {
  background: #111827;
  color: #fff;
}

.ghost-btn {
  background: #fff;
  border: 1px solid #cbd5e1;
  color: #0f172a;
}

.link-btn {
  color: #3554d1;
  background: rgba(82, 113, 255, 0.1);
}

.card-wyti {
  background: linear-gradient(180deg, #ffffff, #eff7f1);
}

.card-wyu {
  background: linear-gradient(180deg, #ffffff, #eff5ff);
}

.login-card {
  margin-top: 24px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: #475569;
  font-size: 14px;
}

.form-grid input {
  border: 1px solid #dbe4ee;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 15px;
}

.link-preview-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 6px;
}

.link-preview-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}

.link-preview-label {
  font-size: 12px;
  font-weight: 700;
  color: #64748b;
}

.link-preview-value {
  font-size: 14px;
  color: #1e293b;
  word-break: break-all;
}

.error-text {
  margin-top: 14px;
  color: #dc2626;
  min-height: 20px;
}

.login-tip {
  font-size: 13px;
  color: #64748b;
}

.forgot-grid {
  grid-template-columns: 1fr;
}

.support-result {
  margin-top: 20px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid #dbe4ee;
  background: #f8fafc;
  display: block;
}

.support-contact {
  color: #334155;
  font-size: 14px;
  line-height: 1.8;
  white-space: pre-wrap;
}

.support-preview-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.support-contact-primary {
  font-size: 18px;
  font-weight: 700;
  color: #0f172a;
}

.support-contact-secondary {
  color: #64748b;
}

.support-qr {
  width: 160px;
  height: 160px;
  object-fit: contain;
  border-radius: 16px;
  background: #fff;
  border: 1px solid #e2e8f0;
  padding: 8px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.38);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 9999;
}

.modal-card {
  width: min(420px, 100%);
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.22);
  border: 1px solid rgba(148, 163, 184, 0.18);
  padding: 28px;
}

.modal-card h3 {
  margin: 0 0 12px;
  font-size: 24px;
  color: #0f172a;
}

.modal-card p {
  margin: 0;
  color: #475569;
  line-height: 1.8;
  white-space: pre-wrap;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 24px;
}

@media (max-width: 900px) {
  .hero {
    flex-direction: column;
  }

  .grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 36px;
  }
}